Fresno Reliability Transmission Projects Gary DeShazo Director, - PowerPoint PPT Presentation

Fresno Reliability Transmission Projects Gary DeShazo Director, Regional Transmission - North Board of Governors General Session March 25-26, 2010

Transmission is needed in the greater Fresno area by 2014 to maintain reliability.  Need is associated with load growth in Fresno  Load growth limits opportunities for the Helms pump storage facility (Helms) to “recharge” its upper reservoir  Reliable electric service in Fresno is dependent on Helms generation  The availability of Helms to generate is dependent on its ability to “recharge”  A Helms reliability dispatch model was used to determine when reliability upgrades would be needed Slide 2

The proposed transmission projects will address the reliability needs in the Fresno area Helms  Gregg Los Banos Fresno  Kings Transmission San Joaquin Network Merced  Panoche McCall Moss Landing Gates 500kV 230kV Slide 3

The 2010 Transmission Plan identified these projects for approval by the ISO Board of Governors Project Estimated Cost Required In-Service Date (million) Reconductor Panoche-McMullin 230 kV line $14 May 2014 Reconductor Panoche-Helm 230 kV and Helm-McCall 230 kV lines $35 May 2014 Reconductor McMullin-Kearney 230 kV line $10 May 2015 Reconductor McCall-Henrietta 230 kV line $20 May 2014 Reconductor Certainteed-Legrand 115 kV line $13 May 2015 Replace terminal equipment on Henrietta-Gates 230 kV line section $2 May 2014 Replace wave traps on Panoche-Gates 1 & 2 230 kV lines $1 May 2014 Modifications to the Helms pump dropping SPS. $13 May 2014 Obtain interim night time temperature adjusted ratings on 7 transmission lines $13 May 2014 Install local SPS to trip McCall 115 kV firm load for Category C contingency $0.50 May 2014 Install SPS to trip firm load for the Helms-Gregg #1 and #2 230 kV DCTL $6 May 2014 contingency Total $127.50 Slide 4

Panoche-Kearney and Henrietta-McCall 230 kV lines overload in 2014 with all lines in service scenario Reconductor Panoche-Kearney and Henrietta-McCall 230 kV lines by 2014 Henrietta- McCall line Slide 5

Panoche-Helm and Helm-McCall, 230 kV lines overload in 2014 during contingency scenario Reconductor Panoche- Helm and Helm-McCall 230 kV lines by 2014 Slide 6

Warnerville-Wilson, Wilson-Storey, Gates-Panoche, Kearney Herndon, Gates-Gregg 230 kV lines overload during contingency scenario Rerate various lines and modify Helms SPS by 2014 Gates- Gates- Gregg line Panoche lines Slide 7

Management recommends that the Board approve the Fresno Reliability Transmission Projects The proposed projects will:  Address several reliability concerns in the Fresno area beginning in 2014  Provide the most cost-effective, feasible solutions to meet the identified needs in this area Slide 8